Apparatus for generating steam.



A. P. RANDALL & E. A. BATES. A. BATES, ADMINISTRATdR 01" E. A. BATES, DEG'D. APPARATUS FOR GENERATING STEAM.

APPLICATION FILED FEB. 3, 1900.

1,1 09,360, Patented Sept. 1, 1914.

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" Q aw/$250729 UNITED STATES PATENT, ortion. i i

ARTHUR r. nANDALnor soivrnnvrttn, AND EDMUND A. Barns, or CHELSEA, Ma'ssA CI-IUSETTS; ALFRED BATES ADMINISTRATOR or SAID EDMUND A. BATES, DE- v GEASED.

1 APPARATUS FOR- GENERATINGSTEAM.

Specification of Letters Patent.

Application filed Fehruary 3, 1900 Serial No. 3,803.

an Improved Apparatus for vGenerating the motor of the engine.

Steam, of which the following ista, specification. t a

In the drawing We have illustrated our invention by a diagram for clearne'ss from which, and the following description, a full and clear understanding of our invention may be had. c

Our invention has for its object to provide a steam generatingcapparatus which will act automatlcally to 'maintam the steam inthe generator or boiler at a predetermined degree of pressure under variations 1n the'rate at WlllCll steam 1s utilized by or supplied to Our invention also has for its object to provide such a' system of control for'steam actuated apparatus :which will be particularly adapted for use in motor propelled vehicles although it will be clear from what follows that our invention is not limited in this respect. I

Our invention hereinafter more fully I set forth in the following description, and v the novel featuresthereof are particularly pointed out and clearly defined in the claims at the close thereof. i 2 1 Having reference to the drawing: 1 represents a steam generator of that class known as flash boilers, sometimes called flashers,

which may be of any suitable type, and 2 the water feed pump for supplying waterto generator 1. The inlet 3 of pump '2 is connected by pipe 1 with water tank 5,, and the l outlet 6 of pump 2. is connected with generator lby pipe 7. Pump 2draws water from tank 5 and forces it into generator 1; and said pump is herein shown as driven by motor 9 connected by pipe '10 with generator 1' and driven by the steam generated in the 1 end of a rod24c made llltWO parts connected latter. 1

Oncrank shaft 11 of motor 9 is the frame of motor 9. v a

The upper end of pistonrod 8 of pump 2 is fast to a yoke 32 which is connected by pin 19 to a block 20 mounted on lever 15,

Patented Sept. 1,1914.

and when shaft 11 is rotated, lever 15 is vibrated on its fulcrum 16 and piston rod 8 is reciprocated. NVhen crank 12 has reached thelimit of its movement toward pump 2 the axis of crank pin 13 is coincident with the axis of pin 18, and when in that position the curve of, lever 15 is the arc of a circle whose center is the axis of pins 13 and 18 and 11111914: and frame 17 can then be swung,

0 pins 13 y and 18 and] lever 15 moved through block 20, tomove fulcrum 16 towardand from pin19 andtherebyvary the length of the stroke of piston'rod 8 The farther fulcrum'16 is away fromj pin 19 the greater will be the length of the strokerof plston rod s, and whenthe axis of fulcrum 16 is moved intocoincidence with the axis ofpin :19 there will be no movement of piston :rod'8, although lever 15 continues to be vibrated by crank 12. It will there'forebe clear that by changingthe relative positions of pin 19 and fulcrum' 16 i the quantity [of water discharged from pump 2v at each stroke of itspiston may be varied,and that although the length ofthe stroke ofthe pis:

ton is varied the point at which the inward stroke of the piston terminates is not ,varled.

Frame 17 isyconnected at its lower end to afplunger 21 which is mounted cylinder 22, and cylinder 22 is connected by pipe 23 with generator l so that'the pressure in cylinder 22 is practically the same as the pressure ingenerator1,-and varies as the pressure in generator 1 varies. The pressure in cylinder 22 acts under certain circumstances to swing frame 17 in one direction and to move fulcrum- 16 toward pin 19,

while a spring 231 acts to resist the outward movement of plunger 21, and under certain circumstances to swing frame 17 in the opposite direction and move fulcrum '16 away from pin 19. One endof spring 231 is connectedto' frame 17 and the other end to one by aturnbuckle25 for adjustment; andthe other end of rod 24: is connected toa lever 26 fulcrumed at 27 on any suitable support.

tions so that the force exerted by spring 231 on frame 17 may be varied, and for the purpose of locking lever 26 in any one of its diflerent positions a rack 28 is provided fassure in generator 1 is suflicient to hold the,

axis of fulcrum 16 in coincidence with the axis of pin 19 pump 2 will be'stopped and maintained inoperative and the feed will be stopped, but when the pressure in generator 1 falls below a predetermined degree of pressure spring 231 moves fulcrum 16 away from pin 19 and pump 2 is started and caused to feed water to the boiler. Thus it will be clear that no water is discharged from pump so long as a predetermined degree of pressure exists inthe generator, and-that pump 2 is caused'to act'only when the pres sure in the generator falls below that predetermined degree of pressure, and that'the quantity of water discharged by the pump during each stroke varies in proportion to the drop of generator pressure below that predetermineddegree, andthis is one of the distinguishing features of our invention.

In the best form of our invention the amount of fuel supplied to the'furnace or burner 29 of generator 1 is varied when the amount of water fed to the generator is varied, and to accomplish this result the upper end of piston-rod 31 of oil pump 30 is herein shown as fast to yoke 32 to which is also fast'the upper end of piston-rod 8, so that when the length of the stroke of piston-rod 8 is variedthatis to say, the yoke 32 serves as a means for synchronizing the movements of the pump pistons irrespective of the variations that are made in the lengths of their strokes-the length of the stroke of pistOnrod 31 is correspondingly varied. Thus it? will be clear that corresponding variations are :caused in both the supply of water and Y the supply of fuel and this is an important feature of our invention.

The inlet of pump 30 is connected by pipe 1' 33 with oil tank 34, and the 'outlet of pump 3 30 is connected with the burner of furnace 5 29 ofgenerator 1 by pipe 35 so that wheni operated'pump 30 draws oil from tank 34 and forces it into furnace 29.

One end of aby-pass 36 of comparatively small capacity communicates with pipe 33 at one side of pump 30, and the other end of bypass 36 communicates with pipe 35 at the other side of pump 30, and this by-pass is normally open so that when pump 30 is stopped enough oil will pass through it around pump 30 to keep the burner' of furnace 29 in operation until said pump is started up again.

XVith flash-boilers it is necessary to make the first injection of water by hand and for this reason we have shown an auxiliary enough steam has been generated in generator 1 with which to start motor 9, when throttle valve 40 is opened and motor 9 thereby set in operation; no further attention being requiredto be given to the engine by the operator unless it be to adjust lever 26 or to manipulate throttle 40 to control motor 9.

In the drawing, which is simply a diagram of one form of'our inventiom we have shown the two pumps as operated by and in unison with motor 9 but inpractice the driving of the pumps may be accomplished by any well known mechanical means for securing such result.

lVhenour invention is embodied in a motor propelled vehicle it is not essential that the two pumps be driven by the same motor which propels the vehicle,neither isit essential that the pumps be operated by a-motor which is driven by the steam generated in boiler 1, for, while we have shown the two pumps as operated by motor 9 which is driven by the steam generated in boiler 1, yet it is to be understood that it is within the scope of our invention to employ any convenient means for driving the pumps.

hat we claim is 1. In an apparatus for generating steam the combination of a boiler, a burner, a reciprocating pump for supplying water to the boiler, a reciprocating pump for supplying fuel to the burner, means for reciprocating said pumps in unison, andautomatic means controlled .by the pressure of the boilor for varying the quantities of water and fuel discharged during each reciprocation of the pumps in proportion to the drop of boiler pressure below a predetermined degree. a

- 2. In a system of control for steam propelled vehicles, the combination of an engine, a boiler, a' burner, a variable stroke Water pump, a variable stroke fuel pump, means for synchronizing the movements of the pump pistons, means which receive a definite movement from the engine for driving the pumps, and automatic compensating means between the pump pistons and the driving means whereby the pump strokes can be varied.

In a system of control for steamactuated apparatus, the combination of an engine, a boiler, a burner, variable stroke pumps for the water and fuel which automatically vary the amount supplied in accordance with the demand, a mechanical connection for driving the pumps from the engine which has a constant length of stroke, a compensating device between'the connection and the pumps, and a throttle valve whereby the engine is directly, and the pumps indirectly controlled 4:. In a system of control for steam-actuated apparatus, the combination of a flash boiler, a burner, a variable-stroke pump for supplying Water to the boiler, a direct connection between the boiler and the pump, a variable-stroke pump for supplying fuel to the burner, and aregula'tor which acts automatically to vary the stroke of both pumps and is itself controlled by the pressure of the boiler. i

5. An apparatus for generating'steam including in combination, a flash generator, a

burner for heating the same, a pump forsupplying Water to the generator, a pump for supplying a fluidfuel to the burner, a motor connected with the generator, an adjustable connection through which said motor posi tivelydriyes the two pumps" in unison, and

' means controlled by thepressure of the fluid in thegenerator for automatically adjusting said connection so as tosimultaneously vary the length of strokes of said pumps When the pressure in the, generator changes and Without varying the quantitative relation between the supplies of Waterand fuel.

ARTHUR F. RANDALL. EDMUND A. BATES.

VVitnessesz] SAML. A; BERRY, ROBERT MORAN.

Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, I). C. 

